"inststub.exe" (56 kb) appears multi times (~10) in Window Task Manager
Ctrl + Alt + delete (processes tab).
"Access denied" when try to stop.
Search: auto and manual can't find "inststub.exe".
4 wierd overlays on MS Outlook email app on standard toolbar.
Outlook closed/opened.
Chat: No help...Performance OK
Your Priority ID is
http://www.norton.com/virushelp
http://security.symantec.com/sscv6/home.asp?langid=ie&venid=sym&plfid=23&pkj=ZIRDRHYTINMHDKDCWLL
[edit: removed support session ID per the Participation Guidelines and Terms of Service.]